[go: up one dir, main page]

BR9915114A - Acoustic device according to the flexural wave principle - Google Patents

Acoustic device according to the flexural wave principle

Info

Publication number
BR9915114A
BR9915114A BR9915114-6A BR9915114A BR9915114A BR 9915114 A BR9915114 A BR 9915114A BR 9915114 A BR9915114 A BR 9915114A BR 9915114 A BR9915114 A BR 9915114A
Authority
BR
Brazil
Prior art keywords
acoustic device
flexural wave
wave principle
resonant modes
coupled
Prior art date
Application number
BR9915114-6A
Other languages
Portuguese (pt)
Inventor
Neil Harris
Original Assignee
New Transducers Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New Transducers Ltd filed Critical New Transducers Ltd
Publication of BR9915114A publication Critical patent/BR9915114A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Golf Clubs (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

An acoustic device has an outer shell (1) supporting bending waves and enclosing a volume (2). The bending waves couple to the enclosed volume to provide coupled resonant modes. A transducer (3, 5) is coupled to the shell to excite the coupled resonant modes. The coupling of the enclosed volume can improve the distribution of resonant modes.
BR9915114-6A 1998-11-06 1999-11-05 Acoustic device according to the flexural wave principle BR9915114A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9824256.3A GB9824256D0 (en) 1998-11-06 1998-11-06 Acoustic devices etc.
PCT/GB1999/003656 WO2000028781A1 (en) 1998-11-06 1999-11-05 Acoustic device according to bending wave principle

Publications (1)

Publication Number Publication Date
BR9915114A true BR9915114A (en) 2001-07-31

Family

ID=10841891

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9915114-6A BR9915114A (en) 1998-11-06 1999-11-05 Acoustic device according to the flexural wave principle

Country Status (16)

Country Link
EP (1) EP1125473B1 (en)
JP (1) JP2002530032A (en)
KR (1) KR20010080941A (en)
CN (1) CN1135058C (en)
AT (1) ATE237211T1 (en)
AU (1) AU745969B2 (en)
BR (1) BR9915114A (en)
CA (1) CA2349861A1 (en)
DE (1) DE69906775T2 (en)
ES (1) ES2197682T3 (en)
GB (1) GB9824256D0 (en)
IL (1) IL142429A0 (en)
NZ (1) NZ510971A (en)
TW (1) TW462202B (en)
WO (1) WO2000028781A1 (en)
ZA (1) ZA200102755B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370939A (en) * 2001-01-04 2002-07-10 New Transducers Ltd A curved or cylindrical bending wave loudspeaker panel
AU2002249373A1 (en) * 2001-04-05 2002-10-21 New Transducers Limited Loudspeaker
US6813362B2 (en) 2001-04-05 2004-11-02 New Transducers Limited Loudspeaker and method of making same
US7245729B2 (en) 2001-04-05 2007-07-17 New Transducers Limited Loudspeaker
JP2006121360A (en) * 2004-10-21 2006-05-11 Authentic Ltd Panel type speaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5119431A (en) * 1987-12-28 1992-06-02 Hamby William H Efficiency loudspeaker
US4989254A (en) * 1989-06-30 1991-01-29 Amalaha Leonard D Electro-acoustic transducer and manufacturing process
UA51671C2 (en) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Acoustic device
GB9705979D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Passenger vehicles
GB9705981D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Personal computers
IL130678A0 (en) * 1997-01-09 2000-06-01 New Transducers Ltd Loudspeakers

Also Published As

Publication number Publication date
TW462202B (en) 2001-11-01
DE69906775D1 (en) 2003-05-15
HK1035988A1 (en) 2001-12-14
AU6481399A (en) 2000-05-29
EP1125473A1 (en) 2001-08-22
GB9824256D0 (en) 1998-12-30
ZA200102755B (en) 2001-10-08
ES2197682T3 (en) 2004-01-01
AU745969B2 (en) 2002-04-11
JP2002530032A (en) 2002-09-10
NZ510971A (en) 2002-03-01
IL142429A0 (en) 2002-03-10
ATE237211T1 (en) 2003-04-15
EP1125473B1 (en) 2003-04-09
CN1135058C (en) 2004-01-14
CN1325606A (en) 2001-12-05
KR20010080941A (en) 2001-08-25
WO2000028781A1 (en) 2000-05-18
DE69906775T2 (en) 2004-01-29
CA2349861A1 (en) 2000-05-18

Similar Documents

Publication Publication Date Title
EA200100303A1 (en) ACOUSTIC DEVICE OF PANEL TYPE USING THE MODES OF VIBRATIONS OF BENDING WAVES
EA200001016A1 (en) ACOUSTIC DEVICE
TW428415B (en) Panel-form loudspeakers
EA200000830A1 (en) ACOUSTIC DEVICE CONTAINING A PANEL ELEMENT BASED ON ACTION OF BENDING WAVES
TR199800372T1 (en) Acoustic device.
WO1998026405A3 (en) Directed acoustic stick radiator
CA2273956A1 (en) Grating transducer for acoustic touchscreen
EP1221823A3 (en) Electroacoustic waveguide transducing
EA199900793A1 (en) ACOUSTIC DEVICE
BR9809609A (en) Speaker vibration transducers in the form of a resonant panel and loudspeaker with the same
PL325245A1 (en) Musical instrument with built-in loudspeakers
SE9101427L (en) PROCEDURAL AND ELECTRO-Acoustic Converters For Broadcasting Of Low-Frequency Acoustic Trolleys In A Trunk
BR9915114A (en) Acoustic device according to the flexural wave principle
WO2003009219A3 (en) Electronic article comprising loudspeaker & touch pad
JP2005500725A5 (en)
WO2001003467A3 (en) Bending wave acoustic device
IT9048608A0 (en) DEVICE FOR THE TRANSMISSION AND RECEPTION OF HIGH RESOLUTION ACOUSTIC SIGNALS, PARTICULARLY FOR UNDERWATER APPLICATIONS, WITH PARABOLOIDAL RECEIVING TRANSDUCER SURROUNDED BY PARABOLIDAL TRANSMISSION TRANSDUCERS WITH DIFFERENTIATED EXCITATION.
AU532596B2 (en) Improving the coupling and directivity of electroacoustic transducers
NZ514593A (en) Acoustic device with transducer coupling one of groups of modes of overlapping frequencies
WO2002013575A8 (en) Bending wave loudspeaker
AU7935700A (en) Keyboard comprising a loudspeaker
GB2000409A (en) Resonators employing surface skimming bulk waves
WO2000078090A3 (en) Bending wave acoustic device
SU777851A1 (en) Hydroacoustic transducer
GB2417386A (en) Acoustic device

Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 5A, 6A E 7A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1913 DE 04/09/2007.